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#include <iostream>

using namespace std;

class Component {

public:

virtual void Operation() = 0;

virtual ~Component() { }

};

class ConcreteComponent :public Component {

public:

void Operation() {

cout << "ConcreteComponent::Operation..." << endl;

}

};

class Decorator {

public:

virtual void Operation() = 0;

virtual void AddBehavior() = 0;

virtual ~Decorator() { }

};

class ConcreteDecorator :public Decorator {

public:

ConcreteDecorator(Component *com) {

_com = com;

}

void AddBehavior() {

cout << "ConcreteDecorator::AddBehavior..." << endl;

}

void Operation() {

cout << "ConcreteDecorator::Operation..." << endl;

AddBehavior();

_com->Operation();

}

private:

Component *_com;

};

int main() {

Component *con = new ConcreteComponent();

Decorator *dec = new ConcreteDecorator(con);

dec->Operation();

delete con;

delete dec;

return 0;

}